diff --git a/src/build/Common.bmake b/src/build/Common.bmake
index 86aeb4de5ed0d2138a3574f412143be0deba6368..9e7ebc8b1ea0702a6c420a3cbc0b1e1976b36710 100644
--- a/src/build/Common.bmake
+++ b/src/build/Common.bmake
@@ -239,6 +239,8 @@ ciolib-mt:
 	set RELEASE=$(RELEASE)
 	set VERBOSE=$(VERBOSE)
 	set BUILDPATH=$(BUILDPATH)
+	set USE_SDL=$(USE_SDL)
+	set STATIC_SDL=$(STATIC_SDL)
 	cd $(CIOLIB_SRC)
 	$(MAKE) -$(MAKEFLAGS) mtlib
 	exit
@@ -266,6 +268,7 @@ uifc-mt:
 	set VERBOSE=$(VERBOSE)
 	set BUILDPATH=$(BUILDPATH)
 	set USE_SDL=$(USE_SDL)
+	set STATIC_SDL=$(STATIC_SDL)
 	cd $(UIFC_SRC)
 	$(MAKE) -$(MAKEFLAGS) mtlib
 	exit